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建立了双星定位和双星／GIS组合定位的计算模型.在此基础上研究了星历误差对双星定位结果的 影响,卫星位置偏差对组合定位结果的影响,在组合定位中,在经、纬度方向上,分别给卫星位置加入均方差 为1°的位置偏差.结果表明,给卫星位置加入均方差为1°的经、纬度方向位置偏差,并不会降低组合定位的 精度.对这一重要结论,从几何上给出了解释.最后进行了双星／GIS组合定位的物理试验.试验结果表明, 双星／GIS组合定位确实可以大大提高双星定位的精度.
Based on this, the influence of ephemeris error on the binary positioning results and the influence of the satellite position deviation on the combined positioning results are studied. In the combined positioning, in the latitude and longitude direction , The position deviations with a mean square deviation of 1 ° are added respectively to the satellite positions.The results show that adding the position deviation of the latitude and longitude with a mean square deviation of 1 ° to the satellite position will not reduce the accuracy of the combination positioning.This important conclusion , And the explanation is given geometrically.Finally, the physical experiment of binary satellite / GIS combination positioning is carried out.The experimental results show that the binary satellite / GIS combination positioning can indeed greatly improve the precision of binary satellite positioning.